CN111636293A - Distributed liquid level balance type vertical damper - Google Patents
Distributed liquid level balance type vertical damper Download PDFInfo
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- CN111636293A CN111636293A CN202010658056.1A CN202010658056A CN111636293A CN 111636293 A CN111636293 A CN 111636293A CN 202010658056 A CN202010658056 A CN 202010658056A CN 111636293 A CN111636293 A CN 111636293A
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- baffle
- water tank
- liquid level
- distributed
- vertical damper
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
Abstract
The invention relates to a distributed liquid level balance type vertical damper, which comprises at least two first water tanks, at least one second water tank and a liquid level balance communicating pipe for communicating the adjacent first water tanks and the second water tanks; the top of the first water tank is provided with a pressure regulating hole, at least one baffle is arranged in the first water tank, and the baffle is fixed on the first water tank through a fixing component; a closed air chamber is arranged at the top of the second water tank; the damper has the advantages of simple structure, low cost, easy installation, good energy consumption capability, good automatic activation performance and strong frequency modulation capability, can perform distributed design on the damper according to the self vibration mode and the damping characteristic of the bridge structure, can provide damping for the multi-stage vertical bending vibration mode of the bridge, effectively controls the vertical vibration of the bridge structure, and improves the comfort level and the safety degree of the bridge.
Description
Technical Field
The invention relates to the technical field of vibration control of civil structures, in particular to a distributed liquid level balance type vertical damper.
Background
The high-order vertical bending mode damping of large-span steel structure suspension bridge is generally lower, and mode distribution is comparatively intensive simultaneously, and under specific wind environment, to bluff body section, vortex vibration takes place more easily, generally chooses the less streamlined (no vortex vibration) girder section of vortex vibration for use, or adopts relevant pneumatic measure (like guide plate, central stabilizer plate, flow board etc.) to avoid the emergence of bridge vortex vibration.
However, the vortex vibration of the bridge is affected by various factors such as incoming wind speed, wind attack angle, wind deflection angle and turbulence, and under certain specific conditions, the vortex vibration cannot be avoided, and for a large-span bridge, multi-stage vortex vibration may occur, so that a barrier, namely a damper, needs to be added for bridge safety in addition to section optimization and pneumatic measures.
The traditional damper mainly aims at the horizontal movement and the low-order mode setting of a bridge and has low contribution to the high-order mode damping, and the distributed tuned mass damper has the defects of complex installation, sensitivity to structural frequency, high maintenance cost and the like.
With the continuous and intensive research on earthquake resistance and disaster reduction of structures in recent years, novel dampers gradually attract attention of people, Tuned Liquid Column Dampers (TLCD) are gradually emphasized due to remarkable damping effects, and by adjusting natural vibration frequency and through the movement of liquid in a similar U-shaped pipe, a TLCD system can generate damping force and weaken the dynamic response of a building main body; a TLCD system can achieve similar behavior in terms of damping to a TMD system with the same mass. By adjusting the orifice, the liquid in the system can be effectively adapted to the vibrations of all levels of the building structure, so that the system can be used as a passive damper or a semi-active damper. The TLCD system also has flexibility in configuration and space to change dynamic characteristics in time, and after the main structure is constructed, parameters thereof can be easily adjusted, but the application of the TLCD system is limited for bridges with complex formation, such as large-span bridges.
Therefore, how to provide a distributed liquid level balance type vertical damper to solve the problems existing in the prior art is a technical problem to be solved urgently by those skilled in the art at present.
Disclosure of Invention
In view of this, an object of the present application is to provide a distributed liquid level balanced vertical damper, which is simple in structure, low in cost, good in energy consumption, strong in frequency modulation capability, and convenient to maintain.
In order to achieve the above object, the present application provides the following technical solutions.
A distributed liquid level balance type vertical damper comprises at least two first water tanks, at least one second water tank and a liquid level balance communicating pipe for communicating the adjacent first water tanks and the adjacent second water tanks;
the top of the first water tank is provided with a pressure regulating hole, at least one baffle is arranged in the first water tank, and the baffle is fixed on the first water tank through a fixing component;
and a closed air chamber is arranged at the top of the second water tank.
Preferably, one side of the first water tank is provided with a slot corresponding to the baffle plate, and the baffle plate passes through the slot and is inserted into the first water tank.
Preferably, the fixing assembly comprises a fixing plate and a sealing ring, wherein the sealing ring is arranged around the groove and surrounds the baffle plate to prevent the liquid medium in the first water tank from flowing out.
Preferably, a positioning plate is arranged on one side, opposite to the slot, of the first water tank, and the positioning plate is used for positioning and supporting the baffle.
Preferably, the baffle is provided with through holes distributed at equal intervals.
Preferably, the baffle is of a grid structure.
Preferably, a gauze is fixed on the baffle.
Preferably, the density of the liquid medium in the first water tank and the second water tank is more than 1000kg/m3。
Preferably, the number of the first water tanks is 4, the number of the second water tanks is 2, and every two first water tanks are respectively arranged at two sides of the second water tank.
Preferably, 2 baffles are arranged in the first water tank, and the 2 baffles are arranged up and down.
The beneficial technical effects obtained by the invention are as follows:
1) the damper solves the problems of complex installation, sensitive structural frequency, high maintenance cost, limited application of a novel damper and the like of the traditional damper, and has the advantages of simple structural form, low price, easy installation, good energy consumption capability, good automatic activation performance, strong frequency modulation capability and great engineering significance;
2) the invention realizes the adjustment of the damping ratio of the tuned liquid damper by adjusting the length of the baffle in the water tank, achieves the designed optimal damping ratio, realizes the optimal effect of vibration control, and simultaneously has wider damping ratio adjusting range;
3) the invention can adjust the arrangement of the damper and the height of the air spring according to the actual vibration condition and frequency of the structure, is suitable for vertical vibration of different modes, and has wider frequency adjustment range;
4) the distributed design of the dampers can be carried out according to the self vibration mode and the damping characteristic of the bridge structure, the multi-order vertical bending vibration mode of the bridge can be damped, the vertical vibration of the bridge structure is effectively controlled, and the comfort level and the safety degree of the bridge are improved.
The foregoing description is only an overview of the technical solutions of the present application, so that the technical means of the present application can be more clearly understood and the present application can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a distributed liquid level balanced vertical damper according to an embodiment of the present disclosure;
FIG. 2 is a top view of a distributed level balanced vertical damper in one embodiment of the present disclosure;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is an enlarged view at B of FIG. 3;
FIG. 5 is a schematic structural view of a baffle in one embodiment of the present disclosure;
FIG. 6 is a schematic view of the structure of a baffle in another embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of a distributed liquid level balanced vertical damper in another embodiment of the disclosure.
In the above drawings: 10. a first water tank; 101. grooving; 102. positioning a plate; 20. a second water tank; 30. a liquid level balance communicating pipe; 40. a baffle plate; 401. a through hole; 50. a fixing assembly; 501. a fixing plate; 502. a seal ring; 60. a pressure regulating hole; 70. a closed air chamber; 80. a liquid medium.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
The term "at least one" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, at least one of a and B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
Example 1
As shown in fig. 1, a distributed liquid level balance type vertical damper includes at least two first water tanks 10, at least one second water tank 20, and a liquid level balance connection pipe 30 for connecting the adjacent first water tanks 10 and the second water tanks 20.
The first water tank 10 and the second water tank 20 are rectangular parallelepiped structures.
Alternatively, the first and second water tanks 10 and 20 have a cylindrical structure.
The top of the first water tank 10 is provided with a pressure regulating hole 60, and the pressure regulating hole 60 is used for regulating the pressure in the water tank to regulate the liquid level difference H0。
A baffle 40 is arranged in the first water tank 10, and the baffle 40 is fixed on the first water tank 10 through a fixing component 50.
As shown in fig. 2, the number of the first water tanks 10 is 4, the number of the second water tanks 20 is 2, every two first water tanks 10 are respectively arranged on two sides of the second water tank 20, and adjacent water tanks are connected by a liquid level balance communicating pipe 30, so that the communication of the liquid media 80 in the water tanks is realized.
As shown in fig. 3, a sealed air chamber 70 is arranged at the top of the second water tank 20, the sealed air chamber 70 realizes the function of an air spring, the natural vibration frequency of the distributed damper is adjusted through the change of the air height Ha in the sealed air chamber 70, and the virtual height of the air spring in the sealed air chamber 70 is a main parameter influencing the natural frequency of the damper.
The density of the liquid medium 80 in the first water tank 10 and the second water tank 20 is more than 1000kg/m3。
Preferably, the liquid medium 80 is montmorillonite ρ 2300kg/m3。
As shown in fig. 4, a slot 101 corresponding to the baffle 40 is formed at one side of the first water tank 10, and the baffle 40 is inserted into the first water tank 10 through the slot 101.
The fixing assembly 50 includes a fixing plate 501 and a sealing ring 502, wherein the sealing ring 502 is disposed around the slot 101 and surrounds the baffle 40 to prevent the liquid medium 80 in the first tank 10 from flowing out.
The fixing plate 501 is disposed outside the first water tank 10 and fixed on the first water tank 10, the baffle 40 and the fixing plate 501 are both provided with positioning holes, and the baffle 40 is fixed on the fixing plate 501 through bolts and nuts.
Alternatively, the baffle 40 is fixed to the fixing plate 501 by screws.
A positioning plate 102 is arranged on one side of the first water tank 10, which faces the slot 101, and the positioning plate 102 is used for positioning and supporting the baffle 40.
In one embodiment, the baffle 40 is detachably fixed in the first tank 10, so that baffles 40 with different characteristics can be adopted according to different requirements.
In one embodiment, the length of the baffle 40 extending into the first tank 10 is adjustable, so as to adjust the damping ratio of the tuned liquid damper, achieve the designed optimal damping ratio, achieve the optimal effect of vibration control, and have a wider damping ratio adjustment range.
As shown in fig. 5, a certain number of through holes 401 are arranged on the baffle 40 at equal intervals.
In one embodiment, as shown in FIG. 6, the baffle 40 is a grid structure.
In one embodiment, the baffle 40 is a grid structure, and a gauze is fixed on the baffle 40.
In another embodiment, as shown in fig. 7, 2 baffles 40 are arranged in the first water tank 10, and the 2 baffles 40 are arranged up and down.
The working principle of the distributed liquid level balance type vertical damper is as follows: according to a non-static Bernoulli equation, designing the frequency of the distributed damper according to the main vertical vibration frequency of the bridge structure:
in the formula, h0Denotes the standard atmospheric pressure P0Lower corresponding liquid level height for water h0≈10m；
n represents the index of variable gas compression used in linearization, and the value of n is between 1.1 and 1.4;
l is the total length of the flow line;
Hav/a is the virtual height of the air spring in the closed air chamber 70.
The second major design parameter of the distributed damper is damping, which is controlled primarily by adjusting the length of the baffle 40 within the tank via the mounting assembly 50. When the baffle 40 is adjusted, the flow velocity of the liquid flowing around the baffle 40 changes, the resistance coefficient and the inertia force coefficient also change, and the acting force of the liquid on the baffle 40 also changes, so that the damping with different effects is generated, and the vibration effect of the liquid is influenced.
The distributed liquid level balance type vertical damper realizes the adjustment of the damping ratio of the tuned liquid damper by adjusting the length of the baffle 40 in the water tank, achieves the designed optimal damping ratio, realizes the optimal effect of vibration control, and has a wider damping ratio adjusting range; the arrangement of the dampers and the height of the air spring can be adjusted according to the actual vibration condition and frequency of the structure, the vertical vibration of different modes can be adapted, and the frequency adjusting range is wide; can carry out the distributed design of attenuator according to bridge construction self vibration mode and damping characteristic, to the multistage vertical bending vibration mode of bridge, all can provide the damping, carry out effective control to the vertical vibration of bridge construction, improve the comfort level and the degree of safety of bridge.
The distributed liquid level balance type vertical damper solves the problems that the traditional damper is complex in installation, sensitive to structural frequency, high in maintenance cost, limited in application of a novel damper and the like, and has the advantages of simple structural form, low price, easiness in installation, good energy consumption capability, good automatic activation performance and strong frequency modulation capability, and has great engineering significance.
The above description is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the present invention, and various modifications and changes may be made by those skilled in the art. Variations, modifications, substitutions, integrations and parameter changes of the embodiments may be made without departing from the principle and spirit of the invention, which may be within the spirit and principle of the invention, by conventional substitution or may realize the same function.
Claims (10)
1. The distributed liquid level balance type vertical damper is characterized by comprising at least two first water tanks (10), at least one second water tank (20) and a liquid level balance communicating pipe (30) for communicating the adjacent first water tanks (10) and the second water tanks (20);
the top of the first water tank (10) is provided with a pressure regulating hole (60), at least one baffle (40) is arranged in the first water tank (10), and the baffle (40) is fixed on the first water tank (10) through a fixing component (50);
and a closed air chamber (70) is arranged at the top of the second water tank (20).
2. The distributed liquid level balancing vertical damper according to claim 1, wherein the first tank (10) is provided at one side with a slot (101) corresponding to the baffle (40), and the baffle (40) is inserted into the first tank (10) through the slot (101).
3. The distributed liquid level balancing vertical damper according to claim 2, wherein the fixing assembly (50) comprises a fixing plate (501) and a sealing ring (502), the sealing ring (502) is disposed around the slot (101) and surrounds the baffle (40) to prevent the liquid medium (80) in the first water tank (10) from flowing out.
4. The distributed liquid level balance type vertical damper according to claim 2, wherein a positioning plate (102) is provided on a side of the first water tank (10) facing the slot (101), and the positioning plate (102) is used for positioning and supporting the baffle plate (40).
5. The distributed liquid level balanced vertical damper according to claim 1, characterized in that the baffle (40) is provided with through holes (401) distributed at equal intervals.
6. The distributed liquid level balanced vertical damper according to claim 1, characterized in that the baffle (40) is of a grid structure.
7. The distributed level balanced vertical damper according to claim 6, wherein a gauze is fixed to the baffle (40).
8. Distributed liquid level balancing vertical damper according to claim 1, characterized in that the density of the liquid medium (80) inside the first tank (10), the second tank (20) is greater than 1000kg/m3。
9. The distributed liquid level balancing vertical damper according to claim 1, wherein the number of the first water tanks (10) is 4, the number of the second water tanks (20) is 2, and every two first water tanks (10) are respectively disposed at both sides of the second water tanks (20).
10. The distributed liquid level balanced vertical damper according to claim 1, characterized in that 2 baffles (40) are provided in the first tank (10), the 2 baffles (40) being arranged one above the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010658056.1A CN111636293A (en) | 2020-07-09 | 2020-07-09 | Distributed liquid level balance type vertical damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010658056.1A CN111636293A (en) | 2020-07-09 | 2020-07-09 | Distributed liquid level balance type vertical damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177415A (en) * | 2020-10-12 | 2021-01-05 | 同济大学 | Annular multi-direction arranged TMD system |
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2020
- 2020-07-09 CN CN202010658056.1A patent/CN111636293A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177415A (en) * | 2020-10-12 | 2021-01-05 | 同济大学 | Annular multi-direction arranged TMD system |
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